Another big night for Australian athletics on Friday.
Here's who's in action, and when.
Looking forward to have you join me.
You're absolutely right, NeilA.
Marita Koch of East Germany.
It stands at 47.60.
That record has stood for 40 years.
47.78!
Sydney McLaughlin-Levrone has smashed the championship record!
She has ran the fastest time for the single lap in over 40 years!
AND SHE DIDN'T WIN IT BY MUCH AT ALL!
Marileidy Paulino just never gave up, never stopped coming down the home straight and she went under 48 as well, 47.98, a new Dominican Republic national record.
That's the third fastest time ever.
Salwa Eid Naser of Bahrain was not even that far away in third! 48.19.
Amazing race in the 400m.
Busang Collen Kebinatshipi, the 21-year-old, just ran the most brilliant first 300m and then powered away down the home straight to win - a world leading time of 43.53.
Jereem Richards won silver for Trinidad and Tobago in a new national record of 43.72.
Bayapo Ndori overhauled veteran Rusheen McDonald at the death to win bronze.
Brilliant race.
And the track is fast.
Very fast.
Great news for Sydney McLaughlin-Levrone in the women's.
Here's Jess Hull talking in the mixed zone after her race, before she learned of her successful appeal.
"I'm probably lucky the track is a bit wet because I just slid rather than hit the ground," she said.
"There was nothing different I could have done.
"I think it deserves a shot from an appeal. I got taken out from behind so I didn't do anything wrong.
"It's not the fault of the pack, that's racing, but I didn't get a chance to run through.
"It happens. Things like this do happen."
Torrie Lewis has had a brilliant championships so far.
Here she is talking in the mixed zone to ABC Sport.
"I'm feeling pretty good," Lewis said.
"Happy with the championship so far. Two PBs."
She said that although she was initially disappointed with the 100, she learned to see it for what it was - a very impressive performance.
"I needed to understand with the 100, even though I didn't make the final, it was a good race and I am happy with it," she says.
"I kinda took that mindset into the 200 and definitely less emotional than the 100."
As for the 200m, she was very happy with how it went.
"I was a little bit tired, but I'm happy with the PB I got yesterday and backed it up with a pretty solid time tonight as well," she says.
She says the team are pretty confident about the relay on the final weekend
David Mark has just reported to us that Jess Hull has been successful in her appeal and will be free to run in the 800m semifinal.
Gout Gout has exams when he gets home.
He's not wasting too much time thinking about that though.
"Probably when I get home," he says about when he'll be thinking about his exams.
"Definitely not right now for sure."
He says it's "crazy" that he's going home to school.
Gout Gout has been speaking in the mixed zone, which is apparently absolutely packed for him.
"It was really good," Gout Gout says.
"Semifinalist and got to compete against the big guys, couldn't be prouder of myself for sure.
"Just excitement. Obviously I was aiming for that sub-20 but today wasn't the day. But for sure in the future it's gunna come."
He says he's going to take away "everything" about his world championships debut.
"[The] Biggest eye opener is that I can compete at the young age that I am, against the best men in the world," he adds.
"That's been the biggest eye opener. Just knowing that I can actually go out there, run hard and place against these grown men, it's great."
It really is.
Nicola Olyslagers doing Nicola Olyslagers things.
She is probably writing about how she's got through to another major final, alongside compatriot Eleanor Patterson.
Both women cleared 1.92 without a failure, joining the 11 others who made it over that height.
That posed something of a problem as the rain started coming down, so if you cleared 1.88 at the first time of asking, you got through too.
That mean's 16 women got through.